How to Password Protect an Excel 2007 File

1. Open the Excel 2007 file. Click the 'Office Button' located in the top-left corner.
2. Select 'Prepare' from the list. Click the option to 'Encrypt Document.' Enter a password. Click 'OK.' Re-enter the password. Click 'OK.'
3. Select 'Save As' from the list. Click 'Tools' located in the lower-left corner of the 'Save As' box. Select 'General Options' from the list. Set a password to open or modify the file. Click 'OK.' Re-enter the password. Click 'OK.'
4. Click the Microsoft Office Button and select 'Save.'